US 589990 A
Description (OCR text may contain errors)
I rrr ALFRED J. KlllGrl-lrl,` OF BOSTON, MASSACHUSETTS.
Fa RE-sxrl NLG u isi-isn.
srncrrrcnzrronformmg part-0f Letters 'Patent NGL 589,990,4 dated September e4.' ieee.
v ilpplicetion i'lled Tune 5,'-1897. Serial No. 639,496. (No model.) I i To all whom it 77ml/ concern.:
' Be it known that I, ALFRED J. KNIGHT, of
Boston, coun-ty of Suffolk, State of Massachusetts, have invented Improvements in Fire- A5t Extinguishers, of which the following description, in connection Withthe accompanying drawings, is a specification, like letters on the `drawings representing like parts. I
J Fire-extinguishers composed of cylinders or .chambers containingfchemicals which v,when j `the cylinder or chamberis inverted will cause f the chemicals to mix and act are frequently carried on-railway-cars, on shipboard, and on lwheeled vehicles, and in motion the liquid in` 4the, cylinder, as the cylinder sways from side `v ."to side under motion, frequently enters -tlie` in sual outlet for it and escapes onthe iioor or tether place where the cylinder stands, which is-very objectionable. This accidental slo ing over of the Water due to swaying of t e "le cylinder very seriously limits the use of thisn :,.classof extinguisher-,and to do' away withV l,thisy difficulty is -the object of this present' rinvention L f ',With my extinguisher as improved thecylindermust betreversed before the liquid can escape@ i f 'f In myinvention thefinterior of the head of the 'cylinder has yapplied to it a ring-conduit which is'open at1 one side, substantially op.` posite the point'of attachment to it of the exit-pipe. y The liquid when it escapes from. the exit-pipe must enter it through the c0n-. duit, this being effected only when the cyl-in der is reversed. This conduit has itslower ledge, considering` the cylinder as right sidef up, arranged .below the outlet-opening lead'- ing to the discharge-pipeand for a part of .imference'offene conduit at a dis-f"A tance from said outlet the lower edgeof the `conduit is not Vsoldered tightly'to the interior ofthe cylinder and liquid-escapes are left, sothat any liquid slopping into theconduit atits entrance vshall pass from the conduit back into the cylinder through said escapes.
Figure l, in elevation, shows a rfire-extinguisher cylinder partially broken out at its upper end to disclose my improvements; Fig. 2, a view looking into the top of the cylinf 5o der. Fig. 3 is a section taken through the i discharge-pipe leading into this conduit about cylinder andi 'conduit whereA its loi/ver edge is not soldered-to thecylindeiz rlhe cylinder Agisand may be common to anyusual nre-extinguisher. The cylinderV .has an'outlet or discharge pipe a, made in the top otnthe cylinder. l This cylinder will be closed at top in usuallmanner and will contain liquidrand usualchemicals, all in usual manner. t l Y' Inside the head c l apply a conduite; it,
vbeing shown as a piece of metal concaved or of such other shape that when applied to the interior of the head it will leave/between its inner side and the said head a conduit, the 6s midway of its height. The upper edge of the piece of metal referred to is -soldered or .secured to the interior of the head, but at its lower edge the said pieceof metal is soldered ,firmly and water-tight to" the head at the point c, Where the y said soldered 'joint is shown by .heavy black line, and at .two'or three other places, as c' e2 c3,thusgleaving,` open spaces at d dfdz. The piece of metal b is c ut outtoleavean inlet at e, and prefer- 75 ably, theinlet is provided with areticulated y scree n.`` `f In use supposerthe cylinder to lie-standing upright on a; .shelf and the shelf or other sup-v port being in motion. The liquid splashing at vtimes entergth'e'conduit at the inlet and thenq'ia win fue about in niegan comme,
but it will not go as far as the outlet leading tl() the pipe a, for it will escape through the escape-passages @cil d2, one or more.
In no case can there remain in the conduit suicient liquid to fill it from the lower edge or uni-piece or inetaitnarnign turni-:rentre escape from the outlet into the pipe a. i
With the extinguisher as improved by lne the liquid which 'inay enter the conduit due to swayingv of. the' cylinder will not escape from the outlet c., but should the cylinder be inverted the liquid wiil then have a freepas- 95 sage into the conduit and escape from. the pipe a. l A. l
' The lower circular edge of the conduit is shown at the right, viewing Fig. Vl, as located farther down from the upper end ,of the cylloo' 8o `aboutfin-the upperpartfof the cylinder will inder at that side thereof substantially diay metrically opposite the outlet, such construction reducing the liability of any liquid which niayppossibly splash into the conduit entering the outlet a.
By the term upper end of the cylinder as used in the claims following I mean the rounded or that part of the cylinder which when the extinguisher is occupying its normal position preparatory to being used is upper- 4ward and outward, and having its lower edge detached from. the interior ot"` said cylinder at a point distant from the said outlet to forni a drip-passage, substantially as described.
2. In a fire-extinguisher, a cylinder provided within its upper end with a conduit in the form of an annulus adjacent the sides of the cylinder and forming an annular chamber therewith, said cond uit being detached at its lower edge fora partoil its length from the interior of said cylinder so as to leave a space or open drip-passage, and an outlet-pipe in said cylinder and communicating with the said condu it a bovcpthe lowermost lpar-tot the latter, substantiallyfas described.
3. In a fire-extinguisher, the combination with a cylinder having an outlet-pipe, of an annular conduit inclosing 'said outlet, said conduit being in the form of a strip bent at its upper and lower edges to approach the cylinder, whereby an annular open passage at its lower edge being inclined away from said outlet whereby the tendency of the liquid which may splash therein is to run away from the outlet, substantially as described.
4. In a fire-extinguisher, the combination with a cylinder having an outlet-pipe, of an annular conduit inclosing said outlet, said conduit being in the form of a strip bent at its upper and lower edges to approach the cylinder, whereby an annular open passage is formed between said strip and cylinder to prevent the splashing of the chemicals in the Aat its lower edge being inclined away from said outlet whereby the tendency of the liquid which may splash therein is to run away from the outlet, and a reticulated opening provided in said conduit at its lowermost side, substantially as described.
5. In a fire-extinguisher, the combination with a cylinder having an outlet-pipe, of an annular conduit inclosing said outlet, said conduit being in the form of a strip bent at its upper and lower edges to approach the cylinder, whereby an annular open passage is formed between said strip and cylinder to prevent the splashing of the chemicals in the cylinder out of said outlet-pipe, said conduit at its lower edge being inclined away from said outlet whereby the tendency of the liquid whichnay splash therein is to run away "from the outlet, said strip being secured to the cylinder throughout its Aupper edge and at portionsonly of its lower'edgc, theA unsecured portions of ,said lower edge being slightly removed from the adjacent surface of the cylinder to provide drip-openings at said point, `substantially as described.
In testimony whereof I have signed' my naine to this specification in the presence of two subscribing witnesses.
ALFRED JQ KNIGHT.
GEO. W; GREGORY,
MARGARET A. DUNN.